The series plot focused on Yugi Mutou, who would unknowingly become possessed by Dark Yugi and defeat wrongdoers in Shadow Games, usually a different game each week. Numerous other real-world and video-game variations also exist. The real-world games are called the Yu-Gi-Oh! Official Card Game and Yu-Gi-Oh! Trading Card Game. It is known in-series as Magic & Wizards and later Duel Monsters.
The card game involves players assembling Decks of Monster, Spell, and Trap Cards that they use to battle each other. Despite the manga's roots focusing on variety of different games, the franchise is largely centered around one card game featured in the series and involves real-world versions of the card game and numerous manga and anime series, in which it is played. Yu-Gi-Oh! (遊☆戯☆王 Yūgiō, Japanese for 'King of Games') is a franchise that began in 1996 as a manga series by Kazuki Takahashi. For other uses, see Yu-Gi-Oh! (disambiguation). For series of the same name, see Yu-Gi-Oh! (manga), Yu-Gi-Oh! (Toei anime), and Yu-Gi-Oh! (anime).